题目内容
Mr. Black provides lonely people with telephone numbers to ring ________ they are in trouble ________ he doesn't want them to be separated from others.
- A.while, unless
- B.if, though
- C.since, but
- D.when, because
Mr Black once decided to travel by air on business because of some reason. He liked 16 beside a window when he was 17 ,so when he got onto the plane, he 18 a window seat. He 19 that all of them had already been taken 20 one, and there was a soldier sitting in the seat beside this one. Mr Black was 21 that he had not taken the one by the window, but, anyhow, he at once went towards 22 .
When he 23 it, however, he saw that there was a notice on it. It was written 24 ink and said,“This is reserved for proper load balance. Thank you.” Mr Black had never seen such a notice in a plane 25 ,but he thought that the plane 26 be carrying something particularly heavy in 27 baggage room which made 28 necessary to have passengers properly balanced, so he walked on and 29 another empty seat, not beside the 30 ,to sit in.
Two or three other people tried 31 in the window seat beside the soldier, but they, too, 32 the notice and went on. Then, when the plane was nearly full, a very beautiful girl stepped into the plane. The soldier, who was 33 the passengers coming in, quickly took the notice off the seat beside him－and 34 that way succeeded in 35 the company of the girl during the whole of the trip.
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